But according to one of the intruders, Billy, they didn’t actually know that the other couples had been married for longer than they had.

“I was like, ‘Why are they so excited to see us? That’s a bit full on, isn’t it? Hmm, they’re very, very welcoming people’,” he said to 9 Honey.

“It didn’t click for me that this was the fourth week of the experiment…I just thought everyone had a few hours to get to know each other, so I was like, ‘Sweet. There guys are nice and familiar with each other. Cool’.”

That must’ve been one massive shock when they eventually realised they were the intruders! A little heads up on this one would’ve been nice, producers.

Both new couples experienced their first ever commitment ceremony and it was a bit of a doozy, especially for Billy.

He chose to “stay” with his wife Susie last night despite their very rocky start. Susie also chose to stay but not before she received a bit of a smack down from expert John Aiken for the rude way she was speaking with Billy.